[INFO] fetching crate scratchstack-aws-signature-hyper 0.10.2...
[INFO] testing scratchstack-aws-signature-hyper-0.10.2 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate scratchstack-aws-signature-hyper 0.10.2 into /workspace/builds/worker-35/source
[INFO] validating manifest of crates.io crate scratchstack-aws-signature-hyper 0.10.2 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate scratchstack-aws-signature-hyper 0.10.2
[INFO] finished tweaking crates.io crate scratchstack-aws-signature-hyper 0.10.2
[INFO] tweaked toml for crates.io crate scratchstack-aws-signature-hyper 0.10.2 written to /workspace/builds/worker-35/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded test-env-log v0.2.7
[INFO] [stderr]   Downloaded scratchstack-aws-principal v0.3.1
[INFO] [stderr]   Downloaded scratchstack-aws-signature v0.10.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff284ec29750ca95fd8f55cfd5bcd8e7dcbb5fe1eb117427a0dd7e792a021320
[INFO] running `Command { std: "docker" "start" "-a" "ff284ec29750ca95fd8f55cfd5bcd8e7dcbb5fe1eb117427a0dd7e792a021320", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff284ec29750ca95fd8f55cfd5bcd8e7dcbb5fe1eb117427a0dd7e792a021320", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff284ec29750ca95fd8f55cfd5bcd8e7dcbb5fe1eb117427a0dd7e792a021320", kill_on_drop: false }`
[INFO] [stdout] ff284ec29750ca95fd8f55cfd5bcd8e7dcbb5fe1eb117427a0dd7e792a021320
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09fbdb9ea78c6eb97171f95d01f66d2baa25b5daeedd306e74c5a59cb4291c94
[INFO] running `Command { std: "docker" "start" "-a" "09fbdb9ea78c6eb97171f95d01f66d2baa25b5daeedd306e74c5a59cb4291c94", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling futures-sink v0.3.17
[INFO] [stderr]    Compiling futures-channel v0.3.17
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling httparse v1.5.1
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]    Compiling tower-service v0.3.1
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling try-lock v0.2.3
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling tower-layer v0.3.1
[INFO] [stderr]    Compiling untrusted v0.7.1
[INFO] [stderr]    Compiling httpdate v1.0.1
[INFO] [stderr]    Compiling hex v0.4.3
[INFO] [stderr]    Compiling tokio v1.11.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling tracing-core v0.1.19
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling mio v0.7.13
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling socket2 v0.4.1
[INFO] [stderr]    Compiling scratchstack-aws-principal v0.3.1
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/scratchstack-aws-principal-0.3.1/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(doc_cfg)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr] error: could not compile `scratchstack-aws-principal` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "09fbdb9ea78c6eb97171f95d01f66d2baa25b5daeedd306e74c5a59cb4291c94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09fbdb9ea78c6eb97171f95d01f66d2baa25b5daeedd306e74c5a59cb4291c94", kill_on_drop: false }`
[INFO] [stdout] 09fbdb9ea78c6eb97171f95d01f66d2baa25b5daeedd306e74c5a59cb4291c94